Cited by 114Pancreatic and Hepatic Oncology ResearchSignaling Pathways in DiseaseProtein Tyrosine Phosphatases

Targeting Inhibitors of the Tumor Suppressor PP2A for the Treatment of Pancreatic Cancer

Open access
Farrell, Amy S., Allen-Petersen, Brittany, Daniel, Colin J., Wang, Xiaoyan, Wang, Zhiping, Rodriguez, Sarah, Impey, Soren, Oddo, Jessica +5 more·2014·Molecular Cancer Research

Abstract

Pancreatic cancer is a deadly disease that is usually diagnosed in the advanced stages when few effective therapies are available. Given the aggressive clinical course of this disease and lack of good treatment options, the development of new therapeutic agents for the treatment of pancreatic cancer is of the upmost importance. Several pathways that have shown to contribute to pancreatic cancer progression are negatively regulated by the tumor suppressor protein phosphatase 2A (PP2A). Here, the endogenous inhibitors of PP2A, SET (also known as I2PP2A) and cancerous inhibitor of PP2A (CIP2A), were shown to be overexpressed in human pancreatic cancer, contributing to decreased PP2A activity and overexpression and stabilization of the oncoprotein c-Myc, a key PP2A target. Knockdown of SET or CIP2A increases PP2A activity, increases c-Myc degradation, and decreases the tumorigenic potential of pancreatic cancer cell lines both in vitro and in vivo. Moreover, treatment with a novel SET inhibitor, OP449, pharmacologically recapitulates the phenotypes and significantly reduces proliferation and tumorigenic potential of several pancreatic cancer cell lines, with an accompanying attenuation of cell growth and survival signaling. Furthermore, primary cells from patients with pancreatic cancer were sensitive to OP449 treatment, indicating that PP2A-regulated pathways are highly relevant to this deadly disease. Implications: The PP2A inhibitors SET and CIP2A are overexpressed in human pancreatic cancer and are important for pancreatic cancer cell growth and transformation; thus, antagonizing SET and/or CIP2A may be an innovative approach for the treatment of human pancreatic cancer. Mol Cancer Res; 12(6); 924–39. ©2014 AACR.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1158/1541-7786.mcr-13-0542

Cites

58 of 58 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The therapeutic effects of inhibition of CIP2A protein expression have been validated by numerous studies.

    “This is a very important finding because the therapeutic effects of inhibition of CIP2A protein expression have been validated by numerous studies [6 -8,10 -12,21].”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

2 of the 60 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. [29]Cristobal I Garcia-Orti L Cirauqui C Cortes-Lavaud X Garcia-Sanchez MA Calasanz MJ Overexpression of SET is a recurrent event associated with poor outcome and contributes to protein phosphatase 2A inhibition in acute myeloid leukemia Haematologica 2012 97 543 50 22133779 PMC3347675

Cited by

Sorted by citations

Authors
Farrell, A. S., Allen-Petersen, B., Daniel, C. J., Wang, X., Wang, Z., Rodriguez, S., Impey, S., Oddo, J., Vitek, M. P., Lopez, C., Christensen, D. J., Sheppard, B., & Sears, R. C.
Affiliations
  • Authors' Affiliations: Departments of 1Molecular and Medical Genetics,
  • Oregon Health & Science University (US)
  • Oncotide Pharmaceuticals (United States) (US)
  • Duke Medical Center (US)
  • 2Hematology and Oncology, and
  • 3Surgery,
Corresponding author
Sears, Rosalie C.
Venue
Molecular Cancer Research
Published
2014-06-01
Volume
12
Issue
6
Pages
924-939
ISSN
  • 1541-7786 (ISSN-L)
  • 1557-3125
OpenAlex
W2108146440
Cited by
114
References
60
Citations by year
2026: 4 · 2025: 10 · 2024: 4 · 2023: 8 · 2022: 8 · 2021: 12 · 2020: 9 · 2019: 11 · 2018: 10 · 2017: 16 · 2016: 11 · 2015: 6 · 2014: 5
FWCI
6.12
Type
journal article
Language
en
Open access
Locations
  • Molecular Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (CA129040, R01CA129040, R01CA196228, R41CA165570, R01CA100855, P30CA069533)
Topics
  • Health Sciences › Medicine › Oncology › Pancreatic and Hepatic Oncology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Signaling Pathways in Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
pancreatic cancer, protein phosphatase 2A, CIP2A, c-Myc, PP2A inhibitors, tumor suppressor regulation, c-Myc degradation, tumorigenicity, cell proliferation, cell survival signaling
MeSH terms
Animals, Cell Movement, DNA-Binding Proteins, Humans, Pancreatic Neoplasms, Peptides, Transcription Factors, Transfection, Signal Transduction, Gene Expression Regulation, Neoplastic, Mice, SCID, Mice, Inbred NOD, Cell Line, Tumor, Cell Proliferation, Mice, Protein Phosphatase 2, Gene Knockdown Techniques, Histone Chaperones

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review